Redo npm

static/header.tpl

@@ -9,6 +9,8 @@
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
+  <script src="https://unpkg.com/react@17/umd/react.development.js" crossorigin></script>
+  <script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js" crossorigin></script>
   <script  src="static/app.js"></script>
 
 <!-- Navigation -->